Thickened oil steam production synergist and its preparing method

A technology of synergist and steam, applied in the fields of fluid production, earthwork drilling, wellbore/well components, etc., can solve the problems of many construction steps, long cycle, high investment, and achieve peak oil production, short cycle, The effect of improving oil displacement efficiency

Inactive Publication Date: 2004-12-15
中国石油化工股份有限公司河南油田分公司石油工程技术研究院 +1
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Problems solved by technology

[0004] However, this method only uses urea decomposition gas to increase the driving energy of steam, and is not suitable for shallow, thin, thick, and scattered heavy oil reservoirs, and steam enhancement only applie...

Method used

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  • Thickened oil steam production synergist and its preparing method

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Embodiment Construction

[0023] The components and configuration conditions of each embodiment of synergist 1-6 of the present invention are as follows:

[0024]

[0025] The present invention uses ammonium carbonate, ammonium bicarbonate, urea, sodium oxide, and sodium carbonate to adopt commercially available products, and its industrial grade purity is above 95%. The surfactant used in the present invention can be alkali lignosulfonate, phenolic polyether viscosity reducer, preferably alkali lignosulfonate. Such as SEPA-1, WPS-3, GL-1, KW-1 and BK-1, etc. Surfactant also can use petroleum sulfonate or alcohol ether sulfate foaming agent, preferably alcohol ether sulfate. Such as LAS, TAS, SS02, HR9801, SD1020, etc.

[0026] In the present invention, alkali, high-temperature surfactant and gas-generating agent are added into a certain amount of water in the order of stirring and dissolving to form a homogeneous solution. Dissolve the alkali in a certain amount of water first, raise the tempera...

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Abstract

The synergist for steam exploitin thickened oil consists of gas creating agent 10-40 wt%, surfactant 5-25 wt% and alkali 0-5 wt% except water. The preparation process includes the steps of: dissolving sodium hydroxide and/or sodium carbonate; adding surfactant via stirring for mixing and adding the gas creating agent via stirring. Under steam temperature urea as the gas creating agent is decomposed to generate CO2 and CO2 and the surfactant form foam to expand the steam wave and volume to raise the oil displacing efficiency and reach the synergistic effects of modifying profile and lower viscosity obviously. The present invention is suitable for exploiting shallow, thin, dense and dispersed thickened oil reservoir. The present invention can raise oil yield and steam heat efficiency.

Description

technical field [0001] The invention relates to the field of petroleum exploitation chemistry, and relates to a heavy oil steam exploitation synergist and a preparation method thereof. Background technique [0002] At present, the synergist used in the steam recovery of heavy oil in domestic oilfields is a single surfactant or alkali. Although the surfactant-based steam synergist has a high viscosity reduction rate, its cost is high, which affects industrial use and is difficult to accept. Alkaline steam booster is cheap, but its use concentration range is narrow, and it is difficult to control on site. In addition, these two types of steam synergists have good effect in the initial stage of heavy oil steam injection production, but with the increase of steam huff and puff cycles, the increase of heavy oil formation will affect the thermal efficiency of steam injection, even if surfactant or Alkaline steam synergists, the production situation is also deteriorating. [0003...

Claims

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Application Information

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IPC IPC(8): E21B43/22
Inventor 谢建军
Owner 中国石油化工股份有限公司河南油田分公司石油工程技术研究院
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